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Nelson Exam Review
Semester Exam
| Question | Answer |
|---|---|
| Cemical properties | include changes that alter the identity of a substance |
| The study of substances containing carbon is | organic chemisrty |
| The particles in a solid are | packed closely together |
| Group __ in the periodic table contains only metals. | 2 |
| Physical means can be used to separate | mixtures |
| An example of an extensive physical property is | mass |
| Which element has properties most similar to those of sodium? | calcium |
| What is an intensive physical property? | color |
| WHat is not a property of metals? | unreactivity |
| A vertical column of blocks in the periodic table is called a | group |
| The symbol for the metric unit used to measure mass is | grams |
| The symbol that represents the measured unit for volume is | mL |
| The SI standard units fir length and mass are | meter and kilogram |
| The SI base unit for time is the | second |
| A change in the force of Earth's gravity on an object will affect its | weight |
| The product of 13cm* 5.7 cm is correctly reported as | 74 cm(2) |
| The graph of an inverse proportion is a | hyperbola |
| The graph of a direct proportion is a | straight line |
| The number of sig. digits in the measurment 210cm is | 2 |
| How many minutes are in one week? | 10,080 |
| NIckel-60 has | 32 neutrons |
| Sulphur-34 contains | 18 neutrons |
| Who called the atom an atom | Democritus |
| Chlorine-35. It has | 17 protons, 17 electrons, and 18 neutrons |
| what does the 218 in polonium-218 represent? | mass number |
| Experiments with cathode rays led to the discovery of the | electron |
| How many sig digs are in 50.00000s | 7 |
| What is the atomic number of Tungsten | 74 |
| How many sig digs are in .0050m | 4 |
| What scientist discovered electrons? | J.J Thompson |
| In SI, the frequency of electromagnetic radiation is measured in | hertz |
| As it travels through space, electromagnetic radiation | exhibits wavelike behavior |
| The distance between 2 successive peaks on a wave is its | wavelength |
| A quantum of electromagnetic energy is called a | photon |
| The wave model of light did not explain | the photoelectric effect |
| The number of orbitals for d sublevel is | 5 |
| For the f sublevel, the number of orbitals is | 7 |
| The main energy level that can only hold 2 electrons is the | first |
| Which group is noble gases | 18 |
| What is th speed of light? | 3.00 * 10(8)m/s |
| The number of valence electrons in Group 17 is | 7 |
| The number of valence electrons in group 2 is | 2 |
| The elements in group 1 are known as | alkali metals |
| A positive ion is known as | cation |
| A negative ion is known as | anion |
| Argon, krypton, and xenon are | noble gases |
| A horizontal row of blocks in the periodic table is called a | period |
| Which group do fluorine and chlorine belong | halogens |
| The elements that border the zigzag line in the perodic table are | metalloids |
| Valence electrons are in the | highest energy level |
| Most chemical bonds are | partly ionic and partly covalent |
| AN octet is equal to | 8 |
| A covalent bond results when __ are shared | electrons |
| Atoms are __ when combined | more stable |
| If 2 covalently bonded atoms are identical, the bond is | nonpolar covalent |
| When atoms share electrons, the electrical attraction of an atom for the electrons is called the atom's | electronegativity |
| THe elctrons involved in the formation of a chemical bond are called | valence electron |
| If the atoms that share electrons have an unequal attraction for the electrons, the bond is called | polar |
| B is not an example of what | molecular formula |
| The elements of the __ group satisfy the octet rule without forming compounds | noble gases |